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A novel class of multimode optical fiber Mach-Zehnder interferometer suited for refractive index measurement is presented. The Mach-Zehnder interferometer was constructed by making two coupling points in a multimode optical fiber at localized regions with an electric arc system. The Mach-Zehnder interferometer as a high sensitive refractive-index sensor to detect changes in the surrounding refractive...
We report a photonic crystal fiber (PCF) interferometer was realized by fusion splicing a short section of PCF between two standard single mode fibers (Corning SMF-28) using a Fitel-S175 splicer. The fully collapsed air holes of the PCF at the spice regions allow the coupling of PCF core and cladding modes. The transmission spectrum exhibits sinusoidal interference pattern which shifts differently...
We present a long period grating sensor fabricated in a large mode area photonic crystal fiber. This device is insensitive to temperature change but highly sensitive to refractive index variation (167.5 nm/RI or 2.57times10-4 limiting resolution).
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